Hans Duffels’s research while affiliated with Naturalis Biodiversity Center and other places

New data on the Heteroptera fauna of La Palma, Canary Islands (Insecta: Hemiptera). In: KMENT P., MALENOVSKÝ I. & KOLIBÁÈ J. (eds.): Studies in Hemiptera in honour of Pavel Lauterer and Jaroslav L. Stehlík. Acta Musei Moraviae, Scientiae biologicae (Brno) 98(2): 459–493. – Heteroptera collected on La Palma in the Canary Islands during the period 2001–2012 are listed. Data for 153 species are given, including 28 species recorded for the first time from La Palma. Six of these species are also new for the Canary Islands: Cantacader quadricornis (Lepeletier et Serville, 1828) (Tingidae), Bryocoris pteridis (Fallén, 1807), Macrolophus pygmaeus (Rambur, 1839), Thiomiris sulphureus (Reuter, 1879) (all Miridae), Amphiareus obscuriceps (Poppius, 1909) (Anthocoridae) and Ischnodemus quadratus Fieber, 1837 (Lygaeidae). Furthermore, the occurrence of eight species on La Palma is confirmed. With this contribution the number of species known from the Canary Islands and La Palma increases to 400 and 216 respectively. The number of Canarian endemic species on La Palma is 48 (22.2 %). Lindbergopsallus lauri Rieger, 2012 and L. lunariae Rieger, Strauß et Günther, 2011 (Miridae), Collartida tanausu J. Ribes, Oromi et E. Ribes, 1998 (Reduviidae) and Nysius gloriae Baena et Garcia, 1999 (Lygaeidae) are only known from La Palma.

The genus Ayesha belongs to the tribe Dundubiini and is distinguished from other genera of the tribe by the spatulate and strongly overlapping male opercula. The synonymy of three species, Cosmopsaltria vomerigera Breddin, 1901, Dundubia lelita Kirkaldy, 1902 and Cicada elopurina Distant, 1888, which are treated as junior synonyms of A. serva (Walker, 1850) in the literature, is confirmed. Two other species, A. spathulata Stål, 1870 and A. operculissima Stål, 1870, are synonymized here with A. serva, so that Ayesha now becomes a monotypic genus. Ayesha serva is redescribed and recorded from Greater Natuna Island, the northern parts of Borneo and Sulawesi and the southern Philippines; the species is mainly found in trees on the beach, in mangroves and other coastal forests. The broad band long lasting monotonous calling song has a very simple and constant pattern. It consists of a fast repetition of many echemes of duration from 41.7 to 79.0 ms, which are composed of 8 to 19 pulses with a repetition rate of 240 pulses per second.

The song and the calling behaviour of the cicada Maua albigutta (WALKER, 1856) from S.E. Asia is described. The majority of the investigations has been carried out in the Endau Rompin National Park, Malaysia. The calling song comprises three main parts (A - C) with characteristic amplitude and especially in the third part with intense frequency modulation. The duration of the whole song is 38.2  5.1 s and is often repeated without interruption many times in succession. Amplitude and frequency modulation is accompanied with movements of the abdomen and during frequency modulated calls also with changes of its shape. Songs from other localities (Kuala Lompat – Malaysia, Krui – Sumatra) are slightly different but clearly follow the same general pattern, and can be attributed with certainty to the same species